Here's a handy examinination of the key ingredients required for a successful pitch, plus a selection of the tough lessons dished out by the Dragons - advice that will hopefully help budding entrepreneurs. The Dragons reveal the secrets of pitching and presentation in six lessons. They also catch up with some of the entrepreneurs who have had the most memorable pitches in the Den to find out how their businesses are getting on Hilary Devey scrutinises the accounts of Bob Davies, who secured investment from her for his gaming product, while Duncan Bannatyne visits Layla Bennett's falconry business in mid Wales to survey his new partners. Narrated by Richard Bacon.